within a Narrow Area. 



159 



through which streams of even such vigor as East and 

 West Sixmile, and Spur Creeks (0, fig. 2), have not yet 

 cut except in the gorge sections of the first two. All of 

 these streams rise in upland marshes whose soil is a rock 

 flour of glacial grinding interpersed with angular rock 

 fragments of local origin, a colluvial deposit which 



Fig. 3. 



Fig. 3. Key map to the glacial phenomena mentioned in text. 



F, Moss Creek Outflow Channel. 

 I, Moss Creek Terminal Moraine. 

 N, Marginal Channels. 

 S, Marginal Channels. 



X, Marginal Channels. 

 Y, Marginal Channels. 

 P', Truncated Spur of Davies Hill. 

 Z, Spur Creek Moraine. 



Areas unmarked are covered with thin drift. Gorges are shown by lines 

 with cross shading. Stadial moraine loops and ridges are indicated by lines 

 with shading in dots. The other markings indicate thick drift and valley 

 filling. 



favors the persistence of swampy areas on the tops of 

 many of the hills. 



In the valley bottoms of East and West Sixmile char- 

 acteristically irregular moraines occur, and between 



